Finding the Fourth Proportional to 122,709.68, 169,282.49 and 71,724.56
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Solution
The fourth proportional to 122,709.68, 169,282.49 and 71,724.56 is: 98,946.66
Step by Step Solution
- Step 1: Write the proportion equation
122,709.68 : 169,282.49 = 71,724.56 : x - Step 2: Convert to fraction form
122,709.68/169,282.49 = 71,724.56/x - Step 3: Cross multiply
122,709.68x = 169,282.49 × 71,724.56 - Step 4: Simplify right side
122,709.68x = 12,141,712,713.47 - Step 5: Solve for x
x = 12,141,712,713.47/122,709.68 - Step 6: Final answer
x = 98,946.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.